I noticed my heated mirror switch was on when I went to start the Coach last week. The Coach would not start, and the batteries read 11.5 volts at the Pro Driver display. So, I turned on the charger and let them charge for an hour while I had breakfast.
Came back, turned the key switch to the on position, and the battery voltage had not changed a bit. I looked down and notice the heated mirror switch was on,turned it off, and the voltage immediately went up and the engine started no problem.
So, it seems like I have a short in one of the mirrors, or one of the heaters is shorting out.
I have noticed with the key off my coach batteries were not holding a charge very well, so I'm wondering if there might be a direct short somehow that by passes the mirror heater switch and the ignition switch .
Another mirror issue is my drivers side convex mirror suddenly has a life of its own and will tilt downward without toggling the switch.